EP0312322B1 - Verfahren zum Herstellen von keramischen Hohlkörpern - Google Patents

Verfahren zum Herstellen von keramischen Hohlkörpern Download PDF

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Publication number
EP0312322B1
EP0312322B1 EP88309526A EP88309526A EP0312322B1 EP 0312322 B1 EP0312322 B1 EP 0312322B1 EP 88309526 A EP88309526 A EP 88309526A EP 88309526 A EP88309526 A EP 88309526A EP 0312322 B1 EP0312322 B1 EP 0312322B1
Authority
EP
European Patent Office
Prior art keywords
ceramic
water
slurry
mold
processes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88309526A
Other languages
English (en)
French (fr)
Other versions
EP0312322A3 (de
EP0312322A2 (de
Inventor
Toshiyuki Hamanaka
Takashi Harada
Fumio Hattori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NGK Insulators Ltd
Original Assignee
NGK Insulators Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP25765687A external-priority patent/JPH0199805A/ja
Priority claimed from JP25766187A external-priority patent/JPH0199804A/ja
Priority claimed from JP25766087A external-priority patent/JPH0199807A/ja
Priority claimed from JP25765787A external-priority patent/JPH0199801A/ja
Priority claimed from JP25765987A external-priority patent/JPH0199803A/ja
Application filed by NGK Insulators Ltd filed Critical NGK Insulators Ltd
Publication of EP0312322A2 publication Critical patent/EP0312322A2/de
Publication of EP0312322A3 publication Critical patent/EP0312322A3/de
Application granted granted Critical
Publication of EP0312322B1 publication Critical patent/EP0312322B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
    • B28B1/28—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor involving rotation of the mould about a centrifugal axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
    • B28B1/261—Moulds therefor

Definitions

  • the present invention relates to a process for producing a ceramic port liner, to be used for lining inner surfaces of exhaust ports for gasoline engines, diesel engines and the like, by drain or slip casting.
  • Such techniques are considered to be effective particularly for four valve type engines which are likely to reduce temperatures of exhaust gases.
  • Such ceramic port liners may be shaped by a drain casting technique, in which a ceramic slurry is poured inside a water-absorbing mold made of gypsum or the like and an excess amount of the slurry is drained after a slurry material is deposited on the inner surface of the mold (For example, see "Ceramic Engineering Handbook” published by Gihoudo Co., Ltd. Dec.
  • valve holes need to be bored at specific locations.
  • valve holes have been formed by mechanical working using a drill or the like after the shaping or firing.
  • a surface of the port liner to be worked is a curved surface, many shortcomings arise, such as that the working takes much time, that locating is difficult, that accurate working needs a great number of steps, and that cracks are likely to be formed due to brittleness of the ceramics even after the firing.
  • US-A-1,337,663 discloses a process for producing a ceramic article with a hole which is formed by covering a plaster surface with shellac at the hole position.
  • DE-A-2657177 discloses a process for producing a ceramic article with a hole by using a separate impermeable mold part.
  • Fig. 1 are shown water-absorbable mold sections 1 and 2 to be used for effecting the present invention.
  • a gypsum mold is ordinarily used, but a water-absorbing resin mold may be used.
  • Water non-permeable faces 4 are formed on the inner surface 3 of the mold section 1 at locations corresponding to valve holes.
  • the water non-permeable face 4 has a shape corresponding to that of the valve hole.
  • the water non-permeable face is formed by any suitable method, such as, by attaching a water non-permeable seal, applying a water non-permeable resin, or burying a water non-permeable resin.
  • a ceramic slurry is poured inside the mold.
  • the ceramic slurry is not limited to any particular one, use of aluminum titanate based ceramic is preferred. This is because this material has heat resistance and a modulus of elasticity suitable for port liners. Water contained in a portion of the poured ceramic slurry which contacts the inner walls of the water-absorbable mold sections 1 and 2 is absorbed thereinto, and a slurry material is gradually deposited inside the mold sections 1 and 2. Since the water non-permeable faces 4 have no such water-absorbing effect, no slurry material is deposited thereon at all.
  • peripheral edges of the holes have only to be slightly corrected, and the number of working steps can greatly be reduced as compared with a conventional process where valve holes are bored in a blank ceramic port liner body by mechanical working. Further, the port liner can be prevented from being cracked during the mechanical working.
  • valve holes can be preliminarily formed in accurate locations without need to locate valve holes 5 by mechanical working.
  • valve holes 5 may freely be formed in any curved surface.
  • the dimensional accuracy of the valve holes 5 can be attained with extremely high accuracy by adjusting the size of the water non-permeable face 4.
  • the ceramic port liner having the valve holes accurately formed can easily be produced by a simple technique that the water non-permeable faces are formed in the inner surface of the water-absorbing mold corresponding to the valve holes.
  • the present invention can substantially contribute to industrial development of the process for producing ceramic port liners.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Claims (1)

  1. Verfahren zur Herstellung einer Öffnungs- bzw. Führungsauskleidung aus Keramik, die zumindest ein Ventilloch (5) aufweist, welches Verfahren das Gießen einer Keramikaufschlämmung in eine wasserabsorbierende bzw. -aufnehmende Form (1) umfaßt, die zumindest eine wasserundurchlässige Abdichtung (4) aufweist, die an einer ihrer Innenflächen an einer Position haftet, die dem Ventilloch entspricht, sowie durch Absorption bzw. Aufnahme von Wasser aus der Aufschlämmung das Ablagern eines in der Aufschlämmung enthaltenen Keramikrohmaterials bis zu einer bestimmten Dicke außer an der/den wasserundurchlässigen Abdichtung oder Abdichtungen (4).
EP88309526A 1987-10-13 1988-10-12 Verfahren zum Herstellen von keramischen Hohlkörpern Expired - Lifetime EP0312322B1 (de)

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
JP25765687A JPH0199805A (ja) 1987-10-13 1987-10-13 セラミックポートライナーの製造方法
JP25766187A JPH0199804A (ja) 1987-10-13 1987-10-13 中空セラミック製品の鋳込成形方法
JP25766087A JPH0199807A (ja) 1987-10-13 1987-10-13 中空セラミック製品の鋳込成形方法
JP25765787A JPH0199801A (ja) 1987-10-13 1987-10-13 セラミック製品の鋳込成形方法
JP25765987A JPH0199803A (ja) 1987-10-13 1987-10-13 セラミックポートライナーの製造方法
JP257661/87 1987-10-13
JP257657/87 1987-10-13
JP257659/87 1987-10-13
JP257656/87 1987-10-13
JP257660/87 1987-10-13

Publications (3)

Publication Number Publication Date
EP0312322A2 EP0312322A2 (de) 1989-04-19
EP0312322A3 EP0312322A3 (de) 1991-03-06
EP0312322B1 true EP0312322B1 (de) 1994-03-09

Family

ID=27530321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88309526A Expired - Lifetime EP0312322B1 (de) 1987-10-13 1988-10-12 Verfahren zum Herstellen von keramischen Hohlkörpern

Country Status (3)

Country Link
US (1) US5013500A (de)
EP (1) EP0312322B1 (de)
DE (1) DE3888279T2 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02167701A (ja) * 1988-12-21 1990-06-28 Ngk Insulators Ltd 排気チャネル断熱用の多枝セラミック管の製造方法
JPH0813446B2 (ja) * 1990-05-30 1996-02-14 株式会社日立製作所 スリツプキヤステイング法
JP2900951B2 (ja) * 1990-11-30 1999-06-02 富士通株式会社 セラミック製中空管の製造方法
KR950002427B1 (ko) * 1991-05-21 1995-03-20 미쯔비시 덴끼 가부시끼가이샤 편향 요크 코어의 제조방법
JPH05149196A (ja) * 1991-10-04 1993-06-15 Ngk Insulators Ltd セラミツクポートライナーの成形方法
JP2649630B2 (ja) * 1992-05-29 1997-09-03 東陶機器株式会社 陶磁器の鋳込み成形方法
US5298213A (en) * 1993-01-13 1994-03-29 Yan-Fei Ju Method of making a ceramic burner head
IE71018B1 (en) * 1994-02-04 1997-01-15 Erin Intellectual Property Lim Liner
KR100422743B1 (ko) 1995-08-26 2004-06-26 도토기키 가부시키가이샤 분체의주입성형방법및주입성형에사용되는주입성형형및주입성형형에사용되는연속기공다공체의제조방법
US5670181A (en) * 1995-10-20 1997-09-23 Stokes; Christine P. Apparatus and method for slip casting for ceramic objects
KR100288751B1 (ko) * 1997-02-24 2001-05-02 윤종용 광페롤용슬리브의제조방법
GB2424610A (en) * 2005-03-30 2006-10-04 Ceram Res Ltd Forming method
DE102014115940B4 (de) 2014-11-03 2016-06-02 Cuylits Holding GmbH Verfahren zur Herstellung eines Isolationsformteils, Isolationsformteil, hergestellt durch dieses Verfahren und Gusswerkzeug zur Herstellung eines Isolationsformteils unter Anwendung des Verfahrens
DE102017111631A1 (de) * 2017-05-29 2018-11-29 Duravit Aktiengesellschaft Verfahren zur Herstellung eines sanitärkeramischen Gussteils

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1337663A (en) * 1919-08-05 1920-04-20 Edward H Lawrence Method of making sanitary earthenware
US1630762A (en) * 1921-05-11 1927-05-31 Westinghouse Electric & Mfg Co Method of and apparatus for forming insulators
GB517204A (en) * 1938-07-22 1940-01-23 Sophie Arcari Improvements in or relating to the manufacture of ceramic liquid containers and of moulds therefor
US2284332A (en) * 1941-08-16 1942-05-26 Pacific Clay Products Company Mold filling apparatus
US2583842A (en) * 1947-07-09 1952-01-29 Eljer Company Method and apparatus for casting ceramic articles
FR979390A (fr) * 1947-09-10 1951-04-25 Rempel Entpr Perfectionnements aux articles creux et à un procédé et appareil pour leur fabrication
US2962790A (en) * 1955-09-23 1960-12-06 Bendix Corp Method of centrifugally slip-casting ceramic materials
US2914834A (en) * 1957-04-15 1959-12-01 Bendix Aviat Corp Method of making ceramic cylinders
US3263957A (en) * 1961-02-09 1966-08-02 Howe Sound Co Apparatus for the production of ceramic, cermet, and metal components
US3533812A (en) * 1961-11-07 1970-10-13 Interpace Corp Process for the manufacture of ceramic articles,and product derived from such process
US3431332A (en) * 1962-07-16 1969-03-04 Interface Corp Ceramic casting techniques
US3392221A (en) * 1965-07-01 1968-07-09 Formold Corp Method for producing hollow ceramic articles
US3383444A (en) * 1965-09-15 1968-05-14 Navy Usa Method of constructing radome
US3481010A (en) * 1966-12-15 1969-12-02 Gen Dynamics Corp Apparatus for forming castings
DE2657177C3 (de) * 1976-12-17 1980-01-24 Keramag Keramische Werke Ag, 4030 Ratingen Verfahren zum Herstellen von Klosettbecken im Hohlgießverfahren sowie mehrteilige Form zur Durchführung des Verfahrens
GB2088331B (en) * 1980-09-30 1984-08-01 Fielding & Platt Ltd Wet concrete dispensing equipment
JPS58208005A (ja) * 1982-05-27 1983-12-03 株式会社イナックス 排泥鋳込み成形方法
JP2518623B2 (ja) * 1986-08-27 1996-07-24 株式会社クボタ 管状セラミツクフイルタ材の製造方法
DE3706208C1 (de) * 1987-02-26 1987-10-22 Feldmuehle Ag Rohrfoermig ausgebildeter Keramikkoerper
EP0437302B1 (de) * 1987-03-24 1994-09-21 Ngk Insulators, Ltd. Keramische Fütterung für Kanäle

Also Published As

Publication number Publication date
US5013500A (en) 1991-05-07
EP0312322A3 (de) 1991-03-06
DE3888279T2 (de) 1994-09-01
EP0312322A2 (de) 1989-04-19
DE3888279D1 (de) 1994-04-14

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